Power-operated roof planer



N 27, 195] R. A. KNUDSON ET AL POWER-OPERATED ROOF PLANER Filed June 26,1950 INVENTORS ATTORNEY Patented Nov. 27, 1951 OFFICE 2,576,607POWER-OPERATED ROOF PLANEB Itaynard A. Knuds on and John Henry Stoker,

' Rapid City, S. Dak.

Application June 26, 1950, Serial No. 170,384 2 Claims. (Cl. 144-1 14)Our invention relates to. mechanism for planing off the old usedsurfaces of worn-out roofing, preparatory to replacement by new roofingmaterials. It. is suitable for other kindred services.

A further object is to provide for quick, easy and complete manualcontrol of the starting, stopping, and speed variation of the drivemotor, and the direction, speed and depth of cut of the planer cylinderand blades.

This invention is accurately and fully disclosed in the. followingdetailed description, and the accompanying drawing to whose severalviews it refers distinctly and specifically; but it is to be understoodthat the invention'is not confined, to this specific disclosure, beingintended to cover such changes and modifications as constitute nomaterial departure from the salient features of the invention, asexpressed in the appended claims.

The shape and arrangements of these blades constitutes an importantfeature of the invention and resides in the novel form of the blades andtheir manner of assembly upon the rotative cylinder II. Each blade is ofelongated form, arcuate in the direction of its length and shaped toconform to and fit snugly upon the face of the cylinder. The blades arearranged in a plurality of groups, each group consisting of a pair ofblades arranged in V formation, with the apices of the Vs at about thecenter of the cylinder, and with the blades of the pairs divergingtherefrom toward the sides of the cylinder. The blades comprise baseportions which are traversed by the bolts 25, by which the blades aresecured to the cylinder. Forwardly inclined portions 23 extend outwardlyfrom the base portions and terminate in toothed planing edges.

In the drawing:

Fig. 1 is a side elevation of the roof planer as seen from the leftside, with the planer cylinder at left.

Fig. 2 is a plan view looking down on Fig. 1, with the planer cylinderat the left.

Fig. 3 is a front elevation of the roof planer as indicated on Fig. 2.

Fig. 4-. is a sectional elevation through the planer blade as indicatedon Fig. 2.

Fig. 5 is a side elevation of the planer blade as indicated on Fig. 4.

Referring to the features of this invention shown on the drawing:

In Figs. 1, 2 and 3, is shown the platform assembly, comprisingright-hand joist I, and lefthand joist 2, to which is nailed securely,or bolted, the motor-platform 3. To this platform the drive-motor 4 isbolted in such position that its shaft 5 is fixed in horizontal relationto the roof or ground, and transverse to the longitudinal axis of theplatform. The planer assembly is carried along thereof, or ground, onwheels 6 and II front ends of joists, 2 and I respectively, in'such.

positions that shaft I2 is horizontal to the roof or ground surface, andextends transversely. to the longitudinal axis of the platform. At theleft end of the planer cylinder shaft I2 is keyed, or similarly secured,V-belt pulley I5 which is driven by V-belt I1, from V-belt pulley I6,similarly keyed or secured, to drive-motor shaft 5. drive motor 4, isattached to some source of electric power supply by flexible cordconnector I8 through control-box I9, which carries on and off switch andstandard means (not shown) for varying the speed of the drive-motor.

In Figs. 1, 2 and 3, also are shown the steering handles 20 and 2|,which are securely bolted to joists 2 and I, respectively. The electriccontrol box I9 is clamped to steering handle 20 in such position as tobe most convenient for manipulation during planer operation.

To the planer cylinder II, as shown in Figs. 1, 2 and 3, are securelybolted the planer cutting blades, 22 and 23, three of each being mountedperipherally on the cylinder in an arcuate spiral position on theleft-hand and right-hand portions of the cylinder, respectively, eachblade covering an arc of about and extending longitudinally of thecylinder from near its side diameter to its center diameter.

In Fig. 4 is shown an enlarged section through blade 23, as indicated onFig. 2, which is sloped forward in the direction of cylinder rotation,pointed for increased cutting eiiect, and provided with teeth 24, asshown in Fig. 5, for further increased cutting efiiciency. The planerblades 22 and 23 are secured to planer cylinder periphery by bolts 25.

The operation of this roof planer is both simple and versatile. Thestandard power supply cord is plugged into any convenient standardreceptacle and the motor switch moved to the ON position. The motorspeed is then adjusted to the character of the duty impending. Whilethis is being done, the planer assembly may be tipped backward so thatthe steering handles rest on the roof or ground, leaving the rotatinplaner cylinder clear of the roof, or ground surface. The handles arethen lifted and the planer assembly wheeled to its starting position.When the planer cylinder is lowered until its cutting blades engage theworn surface to be removed, the course of the planer, the speed ofadvance and the depth of cut into the roof surface are all controlledmanually through the steering handles, in accordance with the operatorsestimate of the duty to be performed.

What is claimed is:

1. A planer head assembly comprising a rotative cylinder and a pluralityof groups of blades mounted upon the periphery thereof, each groupcomprising a pair of said blades, and said blades being, as a whole, ofelongated arcuate formation to fit the periphery of the cylinder, theblades of each pair extending from the center of the cylinder,outwardly, in opposite directions to the opposite sides of the cylinder,whereby said pairs of blades complementally present V-shaped planingelements, there being enough of said V-shaped pairs to extend entirelyaround the cylinder, each blade comprising a base portion, means forsecuring said base portion to the cylinder and an upstanding forwardlyinclined portion, said forwardly inclined portion being serrated toprovide row of teeth along the outer edge of, the blade, said teethhaving cutting edges which lie in substantial parallelism with the faceof the cylinder.

2. A planer head assembly comprising a rotative cylinder and a,plurality of groups of bladesmounted upon the periphery thereof, eachgroup comprising a pair of said blades, and said blades being, as aWhole, of elongated arcuate formation to fit the periphery of thecylinder, the blades of each pair extending from the center of thecylinder, outwardly, in opposite directions to the opposite sides of thecylinder, whereby said pairs of blades complementally present V-shapedplaning elements, there being three of said pairs of blades, eachextending approximately around the cylinder, so that complementally thethree pairs occupy the entire space around the cylinder, each bladecomprising a base portion, bolts traversing the base portion and bindingthe same to the cylinder and a forwardly inclined portion upstandingfrom the base portion and terminating in an outer edge that is serratedto provide a row of planing teeth.

RAYNARD A. KNUDSON.

JOHN HENRY STOKER.

REFERENCES CITED The following references are of record in the" file ofthis patent:

UNITED STATES PATENTS Number Name Date 285,666 Perry Sept. 25 1883795,997 Mathews Aug. 1, 1905 1,278,629 Francis Sept. 10, 1918 1,282,285Plank Oct. 22, 1918 1,437,925 Wagner Dec. 5, 1922 1,688,759 Simpson Oct.23, 1928 1,786,096 Thielmann Dec. 23, 1930

